// 点击查看总数按钮
private void buttonTotal_Click(object sender, EventArgs e)
{
// 关键字
string keyWord = getKeyWord();
if (string.IsNullOrEmpty(keyWord))
{
MessageBox.Show("请输入自定义关键字");
return;
}
// 开始请求
Region region = comboBoxCity.SelectedItem as Region;
handler = new PlaceAPIHandler(region, keyWord);
int totalNum = handler.GetTotalNum((comboBoxProvince.SelectedItem as Region).Name);
if (totalNum < 0) // 返回错误
{
MessageBox.Show(PlaceAPIHandler.GetErrMsg(totalNum));
}
else // 有结果
{
MessageBox.Show(string.Format("区域：{0}，关键词：{1}，共有 {2} 个结果", region.Name, keyWord, totalNum));
}
}
// 请求结果
private void requestData(int rowNum, int colNum)
{
string msg = "请求结束";
int res = 0;
// 开始请求
toolStripStatusLabelResult.Text = string.Format("已获取 {0} / {1} 个POI", handler.GetNum,
handler.TotalNum);
if (rowNum * colNum > 1) // 分块获取数据
{
res = requestBlockPoi(rowNum, colNum);
}
else // 普通获取
{
res = requestRegionPoi();
}
if (res < 0) // 返回错误
{
msg = PlaceAPIHandler.GetErrMsg(res);
}
MessageBox.Show(msg);
toolStripStatusLabelStatus.Text = "就绪";
toolStripStatusLabelResult.Text = string.Format("已获取 {0} / {1} 个POI —— {2}", handler.GetNum,
handler.TotalNum, msg);
}
// 点击分块建议按钮
private void buttonBlock_Click(object sender, EventArgs e)
{
// 关键字
string keyWord = getKeyWord();
if (string.IsNullOrEmpty(keyWord))
{
MessageBox.Show("请输入自定义关键字");
return;
}
// 获取对应矢量
string cityName = comboBoxCity.SelectedItem.ToString();
City city = CityDao.SelectByName(cityName);
if (city == null)
{
MessageBox.Show("此城市没有相应的矢量数据，无法分块获取POI");
return;
}
int fid = Convert.ToInt32(city.Id);
// 开始请求
Region region = comboBoxCity.SelectedItem as Region;
handler = new PlaceAPIHandler(region, keyWord);
int totalNum = handler.GetTotalNum((comboBoxProvince.SelectedItem as Region).Name);
if (totalNum < 0) // 返回错误
{
MessageBox.Show(PlaceAPIHandler.GetErrMsg(totalNum));
}
else if (totalNum <= 400)
{
MessageBox.Show(string.Format("区域：{0}，关键词：{1}，共有 {2} 个结果，无需分块", region.Name, keyWord,
totalNum));
checkBoxBlock.Checked = false;
}
else // 有结果
{
int blockNum = totalNum / 400 + 1; // 最少分块数
Envelope envelope = GisUtil.GetEnvelope(fid);
double x = envelope.MaxX - envelope.MinX;
double y = envelope.MaxY - envelope.MinY;
int xNum = 1;
int yNum = 1;
if (x <= y)
{
double r = y / x;
xNum = Convert.ToInt32(Math.Sqrt(blockNum / r)) + 1;
yNum = Convert.ToInt32(xNum * r) + 1;
}
else
{
double r = x / y;
yNum = Convert.ToInt32(Math.Sqrt(blockNum / r)) + 1;
xNum = Convert.ToInt32(yNum * r) + 1;
}
xNum *= 2;
yNum *= 2;
MessageBox.Show(string.Format("区域：{0}，关键词：{1}，共有 {2} 个结果。建议分块为 {3} 行，{4} 列",
region.Name, keyWord, totalNum, yNum, xNum));
// 自动调整行列分块数
if (xNum > 20)
{
comboBoxBlockCol.Items.Clear();
for (int i = 1; i <= xNum + 10; i++)
{
comboBoxBlockCol.Items.Add(i);
}
}
comboBoxBlockCol.SelectedIndex = xNum - 1;
if (yNum > 20)
{
comboBoxBlockRow.Items.Clear();
for (int j = 1; j <= yNum + 10; j++)
{
comboBoxBlockRow.Items.Add(j);
}
}
comboBoxBlockRow.SelectedIndex = yNum - 1;
}
}
// 点击开始按钮
private void buttonStart_Click(object sender, EventArgs e)
{
// 初始化
dataGridView1.Rows.Clear();
toolStripStatusLabelResult.Text = "";
// 关键字
string keyWord = getKeyWord();
if (string.IsNullOrEmpty(keyWord))
{
MessageBox.Show("请输入自定义关键字");
return;
}
// excel导出路径
IWorkbook workbook = null;
ISheet sheet = null;
if (checkBoxExport.Checked)
{
if (string.IsNullOrEmpty(textBoxSave.Text.Trim()))
{
MessageBox.Show("请选择数据导出路径");
return;
}
// 创建 excel
workbook = new XSSFWorkbook();
sheet = workbook.CreateSheet("poi");
XlsUtil.AddBaiduHeader(sheet);
}
// 开始请求
toolStripStatusLabelStatus.Text = "请求开始……";
// 获取总数
handler = new PlaceAPIHandler(comboBoxCity.SelectedItem as Region, keyWord, dataGridView1, sheet);
int totalNum = handler.GetTotalNum((comboBoxProvince.SelectedItem as Region).Name);
if (totalNum < 0) // 返回错误
{
string errMsg = PlaceAPIHandler.GetErrMsg(totalNum);
MessageBox.Show(errMsg);
toolStripStatusLabelStatus.Text = "就绪";
toolStripStatusLabelResult.Text = errMsg;
return;
}
else if (totalNum == 0)
{
string msg = "没有搜索结果";
MessageBox.Show(msg);
toolStripStatusLabelStatus.Text = "就绪";
toolStripStatusLabelResult.Text = msg;
return;
}
else // 有结果，开始请求
{
int rowNum = 1;
int colNum = 1;
if (totalNum > 400 && checkBoxBlock.Checked) // 分块获取
{
rowNum = Convert.ToInt32(comboBoxBlockRow.SelectedItem);
colNum = Convert.ToInt32(comboBoxBlockCol.SelectedItem);
if (rowNum * colNum > 150) // 可能超过配额
{
if (MessageBox.Show("请求可能超过配额，是否继续？", "", MessageBoxButtons.OKCancel)
== DialogResult.Cancel) // 取消请求
{
toolStripStatusLabelStatus.Text = "就绪";
return;
}
}
}
// 请求
requestData(rowNum, colNum);
// 保存 excel
if (workbook != null)
{
FileStream fs = File.Create(textBoxSave.Text);
workbook.Write(fs);
workbook.Close();
fs.Close();
}
}
}